class/image_fstab: Leave the subdir
class/image_fstab: Leave the subdir

This is a part of IMAGE_PREPROCESS_FUNCS which are run in the same task
so it doesnt return to the same dir after each of the IMAGE_PROPROCESS_FUNCS

hundeboll/core,sknsean/core,sknsean/core,hundeboll/core,sknsean/core,diorcety/oe-lite-core,diorcety/oe-lite-core,sknsean/core,sknsean/core,hundeboll/core,hundeboll/core